Unified Strength Model for Square and Circular Concrete Columns Confined by External Jacket
Publication: Journal of Structural Engineering
Volume 135, Issue 3
Abstract
When the corner radius ratio is defined as (corner radius divided by half breadth of column), circular and sharp cornered square columns are just two special cases when and 0, respectively. It is quite logical that a confined concrete strength model for columns with a corner radius should degenerate into a model for circular and sharp cornered square columns when and 0, respectively. However, this is not the case in any of the existing models, except for the early one by Mirmiran et al. in 1998. Extensive experimental testing on fiber-reinforced polymer (FRP)-confined concrete columns that have a continuous variation of from 0 to 1 has been undertaken by the writers. Based on the experimental findings, a rational procedure is proposed for developing a unified strength model for FRP-confined concrete columns with an arbitrary corner radius. A comprehensive database has been established by collecting all of the available experimental results from the open literature for evaluation of the unified model. The proposed procedure is applicable to concrete columns confined not only by FRP materials but also other materials such as steel plates.
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Acknowledgments
The work described in this paper was fully supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. CityU UNSPECIFIED1113/04E).
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Information
Published In
Journal of Structural Engineering
Volume 135 • Issue 3 • March 2009
Pages: 253 - 261
Copyright
© 2009 ASCE.
History
Received: Jan 12, 2008
Accepted: Oct 6, 2008
Published online: Mar 1, 2009
Published in print: Mar 2009
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